Lessons we’ve learned on real projects (page 225)

The links, tools and tips our engineers and designers share with each other, one “today I learned” at a time.

lessons shared: 3,447
people sharing: 86
database started in: 2016

Today I learned
Avoid using user.is_anonymous in templates. If for some reason the user is not set it will evaluate to False and this could expose sensitive content. Use not is_authenticated instead.
André EricsonFebruary 16, 2017
search.google.com
Don't you know how to validate your microdata schemas? Use this website
Use the Rich Result Test to see what Google results can be generated for your pages and the schema markup validator for generic schema validation.
Anderson ResendeFebruary 15, 2017
htmlreference.io
Good reference for HTML tags:
Flávio JuvenalFebruary 15, 2017
youtube.com
Talk about metrics on Djangocon US:
André EricsonFebruary 15, 2017
Today I learned
When you wrapp a #React component with #Redux you will lose the reference to it. Use getWrappedInstance to get it back
Filipe XimenesFebruary 15, 2017
Today I learned
You can use django.core.mail.outbox when testing your mail in django. This way, you can check the content of your emails.
André EricsonFebruary 15, 2017
uxcellence.com
Great source of UX books:
A growing collection of books for UX practitioners of every flavor
Lais VarejãoFebruary 14, 2017
git-awards.com
we are in the top10 on github awards for Python in Brazil! alongside @rochacbruno @avelino0
SERP builds everyday software: Keybumps for Mac, Zenbu Japanese for iPhone, and free tools, games, and checklists for everyone.
Rob NovelinoFebruary 14, 2017
gist.github.com
This gist can greatly improve speed of tests that sends email in Django.
Tests with email sending speed boost. GitHub Gist: instantly share code, notes, and snippets.
André EricsonFebruary 13, 2017
Today I learned
Avoid the overhead of having the default <select> in Django Admin with all the related instances (ForeignKey or ManyToMany)...
Avoid the overhead of having the default <select> in Django Admin with all the related instances (ForeignKey or ManyToMany) just listing them in ModelAdmin.raw_id_fields. I've just done it and my admin change pages are being loaded up to 10x faster, avoiding a lot of request timed out error.
Victor CarriçoFebruary 8, 2017
Link offline
blog.willj.net · offline
AWS IAM policy for allowing s3cmd to sync to an S3 bucket:
Flávio JuvenalFebruary 8, 2017
kellysutton.com
Interesting post about GraphQL. It covers some interesting uses for it and downsides: "Do We Need GraphQL?"
Retrieving sprawling data graphs is one of the critical issues when building a robust web application. There’s a careful balance among number of responses, response times, and payload sizes. Should fetching a blog post and 10 comments from an API take:
Filipe XimenesFebruary 8, 2017
code.djangoproject.com
Using Django? Be careful with custom values for <meta name="referrer">! Yes, a HTML tag can break Django CSRF protection: ...
Using Django? Be careful with custom values for <meta name="referrer">! Yes, a HTML tag can break Django CSRF protection: (PS: note old browsers might misbehave with new <meta name="referrer"> values too! Better avoid it.)
Flávio JuvenalFebruary 8, 2017
lucumr.pocoo.org
Be careful with Python's New-Style String Format
Some general warnings about the use of str.format in Python.
Filipe XimenesFebruary 6, 2017
smashingmagazine.com
Local Storage And How To Use It On Websites
Storing information locally on a user's computer is a powerful strategy for a developer who is creating something for the Web. In this article, we'll look at how easy it is to store information on a computer to read later and explain what you can use that for.
Felipe FariasFebruary 6, 2017

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Lessons we’ve learned on real projects (page 225)

Avoid using `user.is_anonymous` in templates. If for some reason the user is not set it will evaluate to False and this could expose sensitive content. Use `not is_authenticated` instead.

Avoid using `user.is_anonymous` in templates. If for some reason the user is not set it will evaluate to False and this could expose sensitive content. Use `not is_authenticated` instead.

Don't you know how to validate your microdata schemas? Use this website

Don't you know how to validate your microdata schemas? Use this website

Good reference for HTML tags:

Good reference for HTML tags:

Talk about metrics on Djangocon US:

Talk about metrics on Djangocon US:

When you wrapp a #React component with #Redux you will lose the reference to it. Use `getWrappedInstance` to get it back

When you wrapp a #React component with #Redux you will lose the reference to it. Use `getWrappedInstance` to get it back

You can use django.core.mail.outbox when testing your mail in django. This way, you can check the content of your emails.

You can use django.core.mail.outbox when testing your mail in django. This way, you can check the content of your emails.

Great source of UX books:

Great source of UX books:

we are in the top10 on github awards for Python in Brazil! alongside @rochacbruno @avelino0

we are in the top10 on github awards for Python in Brazil! alongside @rochacbruno @avelino0

This gist can greatly improve speed of tests that sends email in Django.

This gist can greatly improve speed of tests that sends email in Django.

Avoid the overhead of having the default `<select>` in Django Admin with all the related instances (ForeignKey or ManyToMany)...

Avoid the overhead of having the default `<select>` in Django Admin with all the related instances (ForeignKey or ManyToMany)...

AWS IAM policy for allowing s3cmd to sync to an S3 bucket:

AWS IAM policy for allowing s3cmd to sync to an S3 bucket:

Interesting post about GraphQL. It covers some interesting uses for it and downsides: "Do We Need GraphQL?"

Interesting post about GraphQL. It covers some interesting uses for it and downsides: "Do We Need GraphQL?"

Using Django? Be careful with custom values for `<meta name="referrer">`! Yes, a HTML tag can break Django CSRF protection: ...

Using Django? Be careful with custom values for `<meta name="referrer">`! Yes, a HTML tag can break Django CSRF protection: ...

Be careful with Python's New-Style String Format

Be careful with Python's New-Style String Format

Local Storage And How To Use It On Websites

Local Storage And How To Use It On Websites

Found it useful?
Let’s put it to work.

Lessons we’ve learned on real projects (page 225)

Avoid using user.is_anonymous in templates. If for some reason the user is not set it will evaluate to False and this could expose sensitive content. Use not is_authenticated instead.

Don't you know how to validate your microdata schemas? Use this website

Good reference for HTML tags:

Talk about metrics on Djangocon US:

When you wrapp a #React component with #Redux you will lose the reference to it. Use getWrappedInstance to get it back

You can use django.core.mail.outbox when testing your mail in django. This way, you can check the content of your emails.

Great source of UX books:

we are in the top10 on github awards for Python in Brazil! alongside @rochacbruno @avelino0

This gist can greatly improve speed of tests that sends email in Django.

Avoid the overhead of having the default <select> in Django Admin with all the related instances (ForeignKey or ManyToMany)...

AWS IAM policy for allowing s3cmd to sync to an S3 bucket:

Interesting post about GraphQL. It covers some interesting uses for it and downsides: "Do We Need GraphQL?"

Using Django? Be careful with custom values for <meta name="referrer">! Yes, a HTML tag can break Django CSRF protection: ...

Be careful with Python's New-Style String Format

Local Storage And How To Use It On Websites

Found it useful? Let’s put it to work.

Avoid using `user.is_anonymous` in templates. If for some reason the user is not set it will evaluate to False and this could expose sensitive content. Use `not is_authenticated` instead.

When you wrapp a #React component with #Redux you will lose the reference to it. Use `getWrappedInstance` to get it back

Avoid the overhead of having the default `<select>` in Django Admin with all the related instances (ForeignKey or ManyToMany)...

Using Django? Be careful with custom values for `<meta name="referrer">`! Yes, a HTML tag can break Django CSRF protection: ...

Found it useful?
Let’s put it to work.